Rotary furnace.



H. G. AKERS. ROTARY FURNAGE. PPLIOATION FILED Mun, 191s.

1,1 30,953. Patented Mar. 9, 1915.

gamen/Q25', HQ/imi furnace,

STATES PATENT oFFlC/E;

:naar e. Axnns, OF TORONTO, ONTARIO, CANADA. y g. -1 '.'1-4':

ROTARY FUBNACE. y

To all whom it may concern Be it'known'that I, HARRY G. Annes, a subject ofthe King of Great Britain,l 'and a resident of the city of Toronto, in the Province of 0nt'ario,'Canada, have invented certain new and useful Improvements Rotary Furnaces, of which the following is a specification.

This invention relates to furnaces of the rotary cylindrical type, such as are commonly employed in the manufacture of Portland cement. I have found that, when treating certain materials, the ordinary continuously rotating furnace is very unsatisfactory, as the charge, when molten, tends to build up on some refractory linings, while if a carbon lining be employed the lining oxidizes when not covered 4by the charge. I

overcome the difficulty by so arranging thev drive that the furnace may be given an oscillating rotary movement lnstead of a continuous rotary movement, the arc Of rota-A tion being less than 360.

With the drive arranged as above I am l enabled to use a composite lining for the for example carbon may be used for the bottom lining and any Ysuitable refractory material for the top lining.

The furnace .is illustrated'in the accompanying drawin in which- Figure 1 is a slde elevation, partly in sec-.

tion, of my improved furnace, Fig. 2 is a eros-section of the same, and Fig. 3 an enlarged'elevation of the gear.

In the drawings like numerals of reference indicatev corresponding parts in the different figures.

The furnace is in all its main features of the ordinary rotary type, the cylindrical shell 1 being supported in sition on rollers 2 suitably journaled and engaged by the tires or riding rings 3 secured to the exterior Of the shell.

The feed end of the apparatus will be of ordinary construction. The drive also may be of ordinary construction, but is provided with means whreby an Oscillating rotary movement may .be imparted to the shell instead of a continuous rotary movement. The drive comprises the gear 4, driven by the pinion 5 on the shaft 6 on which is secured the bevel gear wheel 7. This bevel gear wheel is in mesh with two bevel pinions 17 loose on the shaft 8 and located at opposite sides of the bevel gear.

Bpeclcatlon Of Letters Patent. Application filed I Iay 1 4, 1913. Serial ya. 167,672.

show for this an incllned po- Patented Mar. 9, A191.5.

Eich Pinion has a clutch member formed on its hub adapted to beI engaged thef sliding clutch member 9 provided with. the shifter ring 10. "Itis evident tha'tby movlng the sliding clutch member 9 to one side or the other the'sh'ellv may' be' driven in either direction at will; To secure the desiredosclllating rotary' movement it is, therefore, merely necessary to shift the sliding clutch member at Predetermined intervals. ,Any suitable shi ting mechanismV mayv be employed for this purpose.

The interior of the furnace has a lining secured therein in the ordinary manner, but the lining itself is composite in character, the portion 1l lining the bottom of the furnace being of different material from the lining 12 of the top Ipart of the furnace.

The arc through which the furnace oscillates may be readily adjusted so that the bottom lining is at all times covered by the charge. This bottom lining may be of carbon or other material, which might be affected by the gases in the furnace and the top lining may be of any suitable refractory material.

For some purposes it is desirable to provide a sort of hearth adjacent the outlet end Of the furnace, in which a charge that melts in the hot zone may be collected and refined. For this purpose a flange 13 is formed near the outlet end inside the fur- `nace which flange need not extend completely around.

As the furnace does not completely rotate it is possible to introduce air or othergases intermediate the ends of the furnace. I purpose the flexible or jointed pipe 15.

As the furnace does not completely rotate it is possible to provide charging and discharging means intermediate its ends which makes it possible to add re-agents or other materials to a partly treated charge or to withdraw molten or solid matter from below.supernatant products. I provide for the purpose described the hopper 17 and the discharge spout 18 which may be of any desired type.

The furnace may be heated in any of the ordinary and well-known ways, though I 4 the charge,F nace which causes the electrical resistance to fall and consequently the'temperature.

Owing to the fact that the furnace lining is of a composite character, the furnace -can be operated as a reverberatory furnace,

theitop linings being; made of suitable ma` l. A rotary furnace comprising a cylindrical shell suitably supported and a composite'lining therefor, the bottom part of one material andv the top part of another material,` fl k as inthe ordinary rotary fur- 2. A rotary `furnace"comprising a,v cylindrical shell suitably supported and a composite lining therefor, the bottom part of onematerial and the top part of another material and means for imparting anoscillating rotary -movement thereto 3. A rotary furnace comprising. a cylindrical shell suitably supported and a com posite lining'therefor, the bottom part of one material and the top part of another material, a flange near-the discharge endforming a hearth, andmeansforimparting-,an oscillating rotary movement thereto.

Toronto, the 8th day of May 1913.

. z HARRY G., AKERS.

Signed in the presence of-- v y J. EDW. Mairena' 4E. P.. HALL. 

